Consumer price index reflects changes in the cost to the average consumer of acquiring a basket of goods and services that may be fixed or changed at specified intervals, such as yearly. The Laspeyres formula is generally used. Data are period averages.

Data up to and including 2002 is from 5% sample. Data from 2003 are based on a significantly enhanced sample size. Data from September 2005are collected via the Regulated Mortgage Survey. 2005 data are based on combined data from the Survey of Mortgage Lenders and the Regulated Mortgage Survey.

Simple averages are more volatile to changes in the structure of the underlying data than mix-adjusted averages.

Data up to and including 2002 is from 5% sample. Data from 2003 is based on a significantly enhanced sample size. Data from September 2005 is collected via the Regulated Mortgage Survey. 2005 data is based on combined data from the Survey of Mortgage Lenders and the Regulated Mortgage Survey.

Based on mortgages completed and adjusted for the mix of dwellings sold.